/**
 * Copyright 2010 Nicholas Alexander Cross
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.dataporter.processing;

import org.dataporter.data.DataObject;
import org.dataporter.data.DataUpdate;

import java.util.List;
import java.util.Map;

public class FieldMapper implements DataProcessor {

    private final Map<String, String> fieldNameMappings;

    public FieldMapper( Map<String, String> fieldNameMappings ) {
        this.fieldNameMappings = fieldNameMappings;
    }

    public List<DataUpdate> process( DataObject object ) throws DataProcessingException {

        for ( String fieldName : fieldNameMappings.keySet() )
        {
            Object value = object.get( fieldName );
            object.remove( fieldName );
            object.put( fieldNameMappings.get( fieldName ), value );
        }

        return null;
    }

}
